noun
ward head; ward mayor; chief administrator of a ward
An official title for the head or mayor-like administrator of a 区, such as a city ward or special ward; the exact role depends on the local government system.
新しい区長が来月就任する。
The new ward mayor will take office next month.
区長は予算案について説明した。
The ward head explained the budget proposal.
町長 is the head or mayor of a town; 区長 is specifically for a ward.
A Sino-Japanese compound of 区, meaning a ward or district, and 長, meaning a head or leader.